<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <div>1</div>
    <div>2</div>
    <div>3</div>
</body>
<!--<script src="../jquery-3.1.0.js"></script>-->
<script src="./itcast.js"></script>
<script>
    var Idvs = I( 'div' );
    var array = Idvs.toArray();





</script>
</html>